THOMAS ADDISON (1793-1860) was born at Long Benton, near Newcastle, England. He received his M.D. degree from the University of Edinburgh in 1815 and went to London to continue his studies at Guy's Hospital, where he was appointed assistant physician in 1824. He was a great teacher as well as physician, and acquired a brilliant reputation.
Addison will always be remembered for his 1855 "Essay on Disease of the Supra-renal Capsules" in which he announced a discovery of remarkable originality and importance: that these organs, not previously known to be the seat of any definite disease, were in certain cases affected in such a way as to produce a fatal malady, with well-marked symptoms, including a remarkable discoloration of the skin, now known as "Addison's disease."